Sealing devices



July 4, 1967 C. J. C. CARLBERG 3,328,917'

SEALING DEVICES Filed March 25, 1965 United States Patent O 3,328,917SEALING DEVICES Carl Johan Christer Carlberg, Nasby Park, Sweden, as-

signor to Aktiebolaget A. M. de Jong, Vallingby, Sweden, a corporationof Sweden Filed Mar. 25, 1965, Ser. No. 442,635 Claims priority,application Sweden, Apr. 8, 1964, 4,310/ 64 2 Claims. (Cl. 49-308) Thisinvention relates to a sealing device for doors or the like comprising asupporting bar attached to the door and a strip which is movable inrelation to the supporting bar and the door and adapted to be pressedagainst the floor by the action of an operation rod coacting with thedoor frame.

The characteristic features of the invention reside in that the stripwhich has the operating rod at its one end is connected to thesupporting bar by at least three obliquely upwardly extending linkshaving openings in their lower ends adjacent to the operating rod, andwhich has cylindrical pivots attached to it for extending through saidopenings, while the upper ends of the links have openings through whichextend cylindrical pivots mounted on the supporting bar, that the loweropening of the link closest to the operating rod is elongated andextends longitudinally of the link, while the upper opening of the samelink, is likewise elongated but extends obliquely downwardly from thelongitudinal direction of the link and outwardly from said link, thatthe intermediary link has round openings at both ends, that the loweropening of the link adjacent the other end of the strip is elongated andextends obliquely downwardly from the longitudinal direction of the linkand inwardly toward said link, while the upper opening of the same linkis elongated and extends longitudinally of the link, and that tensionsprings or like means are interposed between at least the two outerlinks and the strip so as to keep the pivots engaged with those ends ofthe openings in said links which are closest to the operating rod andthereby to counteract a displacement of the pivots in said openingswhereby the strip uponpdownward movement thereof is kept parallel withthe supporting bar until some part of the strip encounters an obstacle.

These features of the invention and the advantages gained thereby willbecome apparent from .the following detailed description in whichreference is made to the accompanying drawing in which:

FIG. l shows one end of the sealing device, one wall being broken away;

FIG. 2 shows the middle portion and one end of the device in FIG. l, onewall being likewise broken away;

FIG. 3 shows a section of the sealing ldevice on line III-III in FIG. 2.v

The sealing devioe according to the invention consists of a U-shapedsupporting bar 1 which is secured in a suitable manner to the lower edgeof the door. Pivots 3 extend between the ange portions 2 of thesupporting bar 1. The strip 4 producing the sealing eiect is locatedbetween the iiange portions 2 and consists of a slender U- shaped strip5 which incorporates the sealing member proper which is carried by thestrip 5 and consists of a hollow profile member 6 of rubber or likeelastic material secured to the strip 5 by gluing or in another suitablemanner. The operating rod 7 is arranged atone end of the U-shaped strip5 and has an .adjustable length in that a threaded portion 8 thereof isengaged in a likewise threaded sleeve 9. The U-shaped strip 5 isconnected to the supporting bar 1 by three links 10, 11 and 12 which areinclined to the longitudinal direction of the sealing device with thelower ends adjacent the end where the ICC operating rod 7 is arranged.Each of the links at the lower end has an opening through which extendsa pivot 13 secured to the strip 5, and at the upper end an openingthrough which extends one of the pivots 3 secured to the supportingbar 1. The pivots 3 and 13 thus allow the links 10, 11 and 12 to swingabout them. The lower opening 10 of the link 10 adjacent the operatingrod is elongated, as will appear from the drawing, and extendslongitudinally of the link 10. Also the upper opening 10l of the samelink 10 is elongated, but extends obliquely downwardly from thelongitudinal direction of the link and in an outward direction from saidlink. In the intermediary link 11 both the lower opening 11 and theupper opening 11 are round and have clearance t with their respectivepivots. The lower opening 12 of the link 12 remote from the operatingrod 7 is also elongated and extends obliquely downwardly from thelongitudinal direction of said link and in an inward direction towardssaid link. Finally, also the upper opening 12 of the same link iselongated but extends longitudinally of the arm. The elongated openingsare of a width substantially equal to the diameter of the round openings11 and 11 in the intermediary link 11. Tension springs 14 are interposedbetween each of the outer links 1i) and 12, respectively, and the strip5 so as to tend to keep the strip 5 raised into a position where thelinks are applied against buffers 15. In the position of engagement ofthe links with said buffers the elongated openings 10 and 12' areparallel as are the openings 10 and 12".

When the operating rod is applied against the door frame, thus makingthe sealing device operative, the strip 5 is displaced andsimultaneously swung downwards by the action of the links intoengagement with the floor. The pivots will come to bear against thoseends of the elongated -openings 10', 10 yand 12', 12 which are closestto the operating rod. As the strip 5 is positively guided by the link 11it will -be parallel with the supporting bar for the entire distance itis moved.

Certain of the openings in the links are of elongated shape because thiswill make it possible for the strip to take an oblique position shouldone end thereof encounter an obstacle, as a rule an irregular section ofthe oor. Should the floor be higher for example at the strip end closestto the operating rod than the remaining floor so that when presseddownwards the strip irst engages said irregularity the pivot associatedwith the opening 10 will be displaced in said opening. As theintermediate link 11 has round pivot openings, the positively controlledmiddle portion of the strip will continue its movement. As aconsequence, the strip 5 will swing so that the farther end thereof willbe slightly in the lead, the pivot associated with the opening 12" beingalso moved in said latter opening. Should the oor at the end most remotefrom the operating rod be higher than the remaining floor there willoccur a similar pivoting movement of the strip. The pivot associatedwith the elongated opening 12 is then displaced in its opening and alsothe pivot associated with the opening 10" will be displaced in itsopening.

In addition to keeping the strip in raised position when the operatingrod is not engaged with the door frame, the tension springs 14interposed between the strip 5 and the links 10 and 12, respectively,tend to counteract the displacing movements of the pivots in theelongated openings, in the two examples of oblique positioning given.The springs thus serve as damping elements, preventing the strip frombeing subjected to too abrupt pivoting and displacing movements.

As is well known, the oor is exposed to considerably higher wear in thedoor opening itself than anywhere else in the room. To provide acomplete seal between the door and the floor also in the case of thefloor being recessed owing to such wear, the strip 5 proper is slightlyyielding or flexible. The .active displacing distance of the sealingdevice can therefor be set according to the most recessed portion of thefloor, in which case the middle portion of the strip when being madeoperative is pressed down into said recessed portion while the endportions rest on the adjoining higher oor portions. Also in thisinstance the pivots will have the necessary clearance by the provisionof the elongated openings in the two outermost links.

lThe above embodiment of the invention was described for purposes ofillustration rather than limitation. All possible Variations andmodifications of the invention are understood as being included withinthe scope of the appendant claims.

What I claim and desire to secure by Letters Patent is:

1. A sealing device for a door or the like comprising a supporting barattached to the door and a sealing strip which is movable in relation tothe supporting bar and the door and adapted to be pressed against theoor or the like by the action of an operating rod coacting with the doorframe and is hinged to the supporting bar by obliquely upwardlyextending links having openings in their lower ends for cylindricalpivots attached to the strip and openings in their upper ends forcylindrical pivots attached to the supporting bar, wherein at leastthree links are interposed between the strip and the supporting -barwith the lower ends of the links situated nearer the end of the stripcarrying the operating rod than the upper ends of the same, the lowerend opening of the link closest to the operating rod end of the strip iselongated and extends longitudinally of the link, while the upper endopening of the same link is likewise elongated but extends slantwisedownwardly from the longitudinal direction of the link and slantwiseaway from the lower end of the link; the intermediate link has roundopenings at both ends; the lower end opening of lthe link adjacent theend of the strip opposite the end of the operating rod is elongated andextends slantwise downwardly from the longitudinal direction of the linkand slantwise towards the upper end of the same link, while the upperend opening in the last mentioned link is elongated and extendslongitudinally of the same; and tension springs or the like `areinterposed between, at least the links having elongated openings and thestrip so as to keep the pivots engaged with those ends of the openingsin said links which are closest to the operating rod end of the strip,and thereby to counteract Aa displacement of the pivots in said openingswhereby the strip upon downward movement thereof is kept parallel withthe supporting bar until some part of the strip encounters an obstacle.

2. A sealing device as claimed in claim 1, wherein the operating rod isof adjustable length, has its inner end pivoted to the strip and extendsthrough a guiding means arranged at the one end portion ofthe supportingbar.

References Cited UNITED STATES PATENTS 938,107 10/1909 Beale 49-3081,681,869 8/1928 Meek 49-308 FOREIGN PATENTS 704 1/1910 Great Britain.741,851 12/ 1955 Great Britain.

DAVID I. WILLIAMOWSKY, Primary Examiner.

HARRISON R. MOSELEY, KENNET-H DOWNEY,

Examiners. A. I. BREIER, Assistant Examiner.

1. A SEALING DEVICE FOR A DOOR OR THE LIKE COMPRISING A SUPPORTING BARATTACHED TO THE DOOR AND A SEALING STRIP WHICH IS MOVABLE IN RELATION TOTHE SUPPORTING BAR AND THE DOOR AND ADAPTED TO BE PRESSED AGAINST THEFLOOR OR THE LIKE BY THE ACTION OF AN OPERATING ROD COACTING WITH THEDOOR FRAME AND IS HINGED TO THE SUPPORTING BAR BY OBLIQUELY UPWARDLYEXTENDING LINKS HAVING OPENINGS IN THEIR LOWER ENDS FOR CYLINDRICALPIVOTS ATTACHED TO THE STRIP AND OPENINGS IN THEIR UPPER ENDS FORCYLINDRICAL PIVOTS ATTACHED TO THE SUPPORTING BAR, WHEREIN AT LEASTTHREE LINKS ARE INTERPOSED BETWEEN THE STRIP AND THE SUPPORTING BAR WITHTHE LOWER ENDS OF THE LINKS SITUATED NEARER THE END OF THE STRIPCARRYING THE OPERATING ROD THAN THE UPPER ENDS OF THE SAME, THE LOWEREND OPENING OF THE LINK CLOSEST TO THE OPERATING ROD END OF THE STRIP ISELONGATED AND EXTENDS LONGITUDINALLY OF THE LINK, WHILE THE UPPER ENDOPENING OF THE SAME LINK IS LIKEWISE ELONGATED BUT EXTENDS SLANTWISEDOWNWARDLY FROM THE LONGITUDINAL DIRECTION OF THE LINK AND SLANTWISEAWAY FROM THE LOWER END OF THE LINK; THE INTERMEDIATE LINK HAS ROUNDOPENINGS AT BOTH ENDS; THE LOWER END OPENING OF THE LINK ADJACENT THEEND OF THE STRIP OPPOSITE THE END OF THE OPERATING ROD IS ELONGATED ANDEXTENDS SLANTWISE DOWNWARDLY FROM THE LONGITUDINAL DIRECTION OF THE LINKAND SLANTWISE TOWARDS THE UPPER END OF THE SAME LINK, WHILE THE UPPEREND OPENING IN THE LAST MENTIONED LINK IS ELONGATED AND EXTENDSLONGITUDINALLY OF THE SAME; AND TENSION SPRINGS OR THE LIKE AREINTERPOSED BETWEEN, AT LEAST THE LINKS HAVING ELONGATED OPENINGS AND THESTRIP SO AS TO KEEP THE PIVOTS ENGAGED WITH THOSE ENDS OF THE OPENINGSIN SAID LINKS WHICH ARE CLOSEST TO THE OPERATING ROD END OF THE STRIP,AND THEREBY TO COUNTERACT A DISPLACEMENT OF THE PIVOTS IN SAID OPENINGSWHEREBY THE STRIP UPON DOWNWARD MOVEMENT THEREOF IS KEPT PARALLEL WITHTHE SUPPORTING BAR UNTIL SOME PART OF THE STRIP ENCOUNTERS AN OBSTACLE.